webi report JSON object [areaId] is not found. Error INF

Hi,

I have created a treemap based on one measure object and given the pallette color based on the custom range (like 0-10, 10-20 etc)

but later based on the business requirement i need to change the measure object and whose values range from 0-10.

So i have to change the custom range values as well as the color corresponding to these range values in the chart.

Am able to change the custom range values in the chart but not able to change the associated color as it is saying webi report JSON object [areaId] is not found. Error INF .

What to do ? how to fix this.